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Tom West's Custom PC77 PumpMaster Classic Short Rifle

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Plus a little help from design.

March 16 2012 at 12:50 PM
Ron  (Login oo7fuzz)
Crosman Forum Member
from IP address

Response to Pump tube stretch is common to all. But the barrel bending is unique...

The line of force extending from the screw which secures the valve directed to the pump arm pivot tend to promote tube bending. The bend is highlighted by the absence of material at the bottom because of the tube slot.

It just seems that the whole design is bent to bend.

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